Apex domains cannot have CNAME records.
Question and response
Question
dig cafe. NS
Answer
cafe. 5 NS v2n0.nic.cafe.
cafe. 5 NS v0n0.nic.cafe.
cafe. 5 NS v0n2.nic.cafe.
cafe. 5 NS v0n1.nic.cafe.
cafe. 5 NS v0n3.nic.cafe.
cafe. 5 NS v2n1.nic.cafe.
Authority
The response has no authority records.
Additional
v0n0.nic.cafe. 167158 A 65.22.20.44
v0n1.nic.cafe. 167119 A 65.22.21.44
v0n2.nic.cafe. 167119 A 65.22.22.44
v0n3.nic.cafe. 167158 A 161.232.10.44
v2n0.nic.cafe. 167158 A 65.22.23.44
v2n1.nic.cafe. 167119 A 161.232.11.44
v0n0.nic.cafe. 167158 AAAA 2a01:8840:16:0:0:0:0:44
v0n1.nic.cafe. 167119 AAAA 2a01:8840:17:0:0:0:0:44
v0n2.nic.cafe. 167119 AAAA 2a01:8840:18:0:0:0:0:44
v0n3.nic.cafe. 167158 AAAA 2a01:8840:f4:0:0:0:0:44
v2n0.nic.cafe. 167158 AAAA 2a01:8840:19:0:0:0:0:44
v2n1.nic.cafe. 167119 AAAA 2a01:8840:f5:0:0:0:0:44
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0